Get a jump start on the growing season with Jiffy's 42mm Windowsill Greenhouse, a watertight tray with 10 peat pellets to help you germinate seeds indoors before planting outside. The compact pellets make less mess than loose soil, expand when you add warm water, and grow to about 1-1/2" tall, providing ample room for most seed varieties. Perfect for amateur gardeners, kids, and family projects, this seed starting kit is a convenient tool to help you achieve gardening success. | Jiffy 42mm 10 Cell Windowsill Greenhouse in Black